Shimano Dura Ace track cog
Dura Ace cogs are made from hardened steel for long life.
FYI: All track cogs have 1.370"x24tpi threading. ALL OF THEM. Any threaded cog can be used on any threaded track hub.
• NJS stamped
• 3/32" or 1/8"
• standard 1.370"x24tpi English threading
• 13-16t
